The strength of bumping force of a surface bumper jar in the course of releasing stuck tool hinges on various factors.

地面下击器解卡时产生震击力的大小与多种因素有关。

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The strength of bumping force of a surface bumper jar in the course of releasing stuck tool hinges on various factors.

地面下击器解卡时产生震击力的大小与多种因素有关。

youdao